Loans Held for Investment and Allowance for Credit Losses on Loans - Transfers from Loans and Premises and Equipment to Other Real Estate Owned, Repossessed Assets and Other Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Noncash Investing and Financing Items [Abstract]
Other real estate owned	$ 3,459	$ 2,563	$ 12,651
Repossessed assets	2,019	1,040	844
Other assets	0	1,943
Total	$ 5,478	$ 5,546	$ 13,495